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 * The Universal Permissive License (UPL), Version 1.0
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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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package com.oracle.graal.python.nodes.bytecode.instrumentation;

import java.util.Set;

import com.oracle.graal.python.nodes.bytecode.PBytecodeRootNode;
import com.oracle.truffle.api.instrumentation.InstrumentableNode;
import com.oracle.truffle.api.instrumentation.StandardTags;
import com.oracle.truffle.api.instrumentation.Tag;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.source.SourceSection;

/**
 * @see InstrumentationRoot
 * @see InstrumentationSupport
 */
class InstrumentationRootImpl extends InstrumentationRoot {

    @Child private volatile InstrumentationSupport instrumentationSupport;

    @Override
    public InstrumentableNode materializeInstrumentableNodes(Set<Class<? extends Tag>> materializedTags) {
        if (materializedTags.contains(StandardTags.StatementTag.class)) {
            if (instrumentationSupport == null) {
                Node node = getParent();
                while (!(node instanceof PBytecodeRootNode)) {
                    node = node.getParent();
                }
                PBytecodeRootNode rootNode = (PBytecodeRootNode) node;
                if (rootNode.getSource() != null && rootNode.getSource().hasCharacters()) {
                    instrumentationSupport = insert(new InstrumentationSupport(rootNode));
                    rootNode.materializeContainedFunctionsForInstrumentation(materializedTags);
                    notifyInserted(instrumentationSupport);
                }
            }
        }
        return this;
    }

    @Override
    public InstrumentationSupport getInstrumentation() {
        return instrumentationSupport;
    }

    @Override
    public SourceSection getSourceSection() {
        return getRootNode().getSourceSection();
    }
}
